Casio Classpad 400/500 Graphics commands?

[toml_12953]

Some questions I have:
1. Is there a way to clear the screen to a color other than white or to fill the screen with a color?

2. Can Casio BASIC use the entire screen for graphics? If so how? Right now, I can only use the lower half of the screen and PxlOn gives domain error.

3. Can Casio BASIC use a rotated screen? I try to rotate it and get Can't rotate.

4. Can BASIC rotate the screen automatically? This would be better than making the user do it before the program is run.